Wednesday treadmill

Couldn't face a long one, but did some invigorating mild intervals: 10 mins. warmup, then 6 x (4 mins. 5.5mph @ 3% grade, 2 mins. walk on flats). 45 mins. total, pretty much evenly split zone 1/2 (just tipping into bottom of zone 3 by the end of the last couple intervals). I will do a harder-effort version of this on a day when I am feeling more energetic...